"While not the top performing heat sink in the performance category, the SilenX Effizio does quite well and certainly offers a decrease on operating temperatures in both stock and overclocked scenarios. When overclocked, it cools a scant 4 °C warmer than the vaunted Thermalright Ultra Extreme and is 5 °C warmer than the Noctua NH-U12P. When compared to the all-in-one liquid cooling solutions, it delivered performance on par with these solutions with a slightly better noise signature. The direct contact heat pipe design helps the Effizio reach these lower temperatures"

FULL STORY @ OVERCLOCKERSCLUB(http://www.overclockersclub.com/reviews/silenx_extreme/)